让SqlCommand也返回DataSet

public  DataSet PickNumber()
         {
            SqlCommand comm = new SqlCommand();
            comm.CommandText = "PickNumber";
            comm.Connection = Sqlcn;
            comm.CommandType = CommandType.StoredProcedure;

            SqlParameter ParameterCount = new SqlParameter();
            ParameterCount.ParameterName = "@Count";
            ParameterCount.SqlDbType = SqlDbType.Int;
            ParameterCount.Value = XH.DataAccess.DataAccess.PersonCount;
            ParameterCount.Direction = ParameterDirection.Input;
            comm.Parameters.Add(ParameterCount);

            sad = new SqlDataAdapter(comm);
            try
            {
                sad.Fill(ds,"PickNumber");
                XH.DataAccess.DataAccess.iState = 0;
            }
            catch(System.Exception)
            {
                XH.DataAccess.DataAccess.iState = 4;
            }
            finally
            {
                sad.Dispose();
            }

            return ds;
        }